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R. S. TROGNER.

SELVAGE TRIMMER.- APPLICATION FILED JULY 3,1918.

Patented Oct. 21, 1919.

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ROLAND S. TROGNER, OF AKRON, OHIO, ASSIGNOR TO THE GOODYEAR TIRE RUBBER.

COMPANY, OF AKRON,

OHIO, A CORPORATION OF OHIO.

SELVAGE-TRIMMER.

To all whom it may concern:

Be it known that I, Roman S. TRoeNER, a citizen of the Akron, in thecounty of Summit and State of Ohio, have invented new and usefulImprovements in Selvage-Trimmers, of which the following is aspecification.)

y present invention relates to devices for trimming the selvage edges-,'from a strip of moving fabric and more specifically re lates to'anapparatus coinprisingan osclllatably mounted knife with" which there isassociated a guide in cOnta'ctjwith-Q the selvagee-dge of the fabric tobe trimmed.

i s it is a matte-r of frequent: occurrence that the fabric whoseselvage is to be removed comes to hand in rollsg-of uneven Winding ithas been one of the. principal objects of the invention to provide noveland improved means of an automatically variable nature which willrespond readily to any variations in the meandering edge of the fabric.i

It is a further object of the invention to provide a combination ofknife and guide means which are fixed with relation to each other insuch manner-that a movement of the guide by contact of such relation tosaid variable edge as to trim a .uniform width of selvage therefrom.

Itis a still further object to provide a simple selvage trimmingmechanism consisting of a motor mounted for oscillation in a verticalplane and in a path at right angles to the selvage, and accompanied by acontinuously driven knife and a guide which- Specification of LettersPatent.

United States, residing at.

the variable selvage edge therewith will maintain the knife in in suchmanner that the similar nature, which will be hereinafter morespecifically treated, are preferably accomplished by such means as areillustrated in the accompanying drawings, described in the followingspecification, and then more particularly pointed out in'the claimswhich are appended hereto and form a part of this application.

ith reference to the drawings, wherein there has been illustrated apreferred embodiment of the invention as it is reduced to practice, andthroughout the several views of which, similar reference numbersdesignate corresponding parts:

F lgure 1 is a view in erspective of the simple apparatus compre endedby this invention;

Fig. 2 is a broken plan view of the selvage trimming device; a i

Fig. 3 is a detail sectional view of a simple selvage knife; and Fig. 4is a similar view of a pair of coacting cutter elements.

The apparatus consists simply of a motor carrying a direct-driven knifeupon its ar mature shaft, a guide member secured to the motonand meanssensitively mounting the motor; for oscillation in a vertical plane atright angles to the selvage edge of the moving fabric.

he latter is conducted over rolls 5 which may form a portion of acalendering machine for the fabric, if so desired; the fabric beingindicated by the numeral 6. At any convenient point along the path ofthe mov ing fabric there is arranged a support arm 7 which has at itsopposite extremities the base plate 8 and the T-head 9. Arranged inalinement, and projecting in opposite directions from the T head 9, aretrunnions 10 which are provided with conical bearing extremities 11.These latter are receivable in axial bearing sockets provided in the extremities of adjusting bolts 12 which maybe threadingly engaged with anysuitable type of framework (not shown) for the support thereof at aproper position with regard to the fabric rolls 5.,

The motor 13 is provided with a support plate 14: which is adap ed toregisterwith Patented Oct. 21, 1919.. Application filed J uly 3, 1918.Serial No. 243,124.

-vention preferably the base plate 8 of the.. ai'n i I maid" to ,besecured thereto by any desirable fastening means 15. The armature shaftof this motor, indicated by the numeral 16, carries a bearing member orsleeve 21, Figs. 1 and 2, against which tlie'knife 17 may be adjustablyheld through the medium of the nut head 22, the latter being threadedover the extremity of the shaft 16 in the manner clearly illustrated.

The guide element provided by this 111- comprises a plate member' 18,one edge of which is bent upward to provide the support arms 19 and 20whereby the guide may be attached to the casing of the motor 13 in suchmanner that the guide plate 18 is projected into the path of the movingfzbric 6 in parallelism to the motor shaft 16. The arm 19 of this guideplate is apertured to pennit the projection of the motor shaft andsleeve therethrough.

The selvage guide of the device is formed by meaiisof an angular member23 which is supported in spaced parallel relation with the plate 18through the medium of bentdown lugs 24 and fastening means 25 of thecharacter shown. This guide member 23 is cut away in the manner denotedby the numeral 26, Fig. 2, to permit the projection of the knife 17therethrough, while the base plate 18 of the guide member is slotted at27 for a similar purpose, one edge of the slot- 27 being formed as acutting edge 28 to coact with the rotatable knife 17.

If desired, however, theniodification disclosed in Fig. 4: may beresorted to, this modification consisting in the employment of a diskknife '29 to coact with the similar knife 17, such added knifeprojecting up through the slot 2-7 of the plate member 18 and beingslidably mounted upon a shaft 30 and resiliently held by such means as acoil spring 31 in yieldable contact with the rotatable knife 17.

In mounting the, device for operation care is taken to so place theadjustable bearing elements 12 with relation to the normal or averagepath of the fabric edge that with the guide member in contact with suchedge the motor 13 is forced backward slightly out of a true verticalposition. This arrangement assures a positive contact of the back of theguide member 23 with the selvage edge owing to the tendency of the motorarm in its sensitive mounting to resume its normal plumb position. Afterthe fabric has once been threaded between the parallel members 18 and 23of the guide it will be apparent that forward movement of the fabric,accompanied as it may be with lateral variations due to uneven windingon the fabric roll or sinuosities of the selvage edge itself, willresult in corresponding latrelation to the edge of the fabric to eralmovement of the guide member and perforce of the motor and knife. Inthis manner the trimming mechanism will be shifted in accordance withthe passage of the fabric in such manner as to -trim a uniform width ofselvage 32 from the fabric G, irrespective of any irregularities of flowover the rolls 5.

It will be obvious to be trimmed have two selvage edges, a pair of theselvage trimming units which I have disclosed may be employed to Workindethat should the fabric.

pendently yet simultaneously upon the opposite fabric edges.

WVhat I claim is:

1. In a selvage trimming mechanism, a trimming element; a motor fordriving said element; a fabric guide supported from said motor; andmeans mounting said motor, guide and trimming element as a unitary groupbearing an automatically retained trimmed irrespective of the edgesinuosities of the latter.

2. In a selvage trimming mechanism, a trimming element; a fabric guide;a motor supporting the guide and driving the element and meanssuspending the motor for oscillation in such manner that said guide andtrimming element are continuously engaged with the selvage of the fabricto be acted upon irrespective of the edge sinuosities of the fabric.

be as 3. In a selvage trimming mechanism, a i

trimming element; a guide; a motor supporting the guide and driving thetrimming element as a unitary group capable of oscil lation at rightangles to the path of the fabric to be trimmed. said suspension meansacting to automatically maintain a positive contact between the guideand the fabric.

4. In a selvage trimming mechanism of the character described, aswingingly mounted supporting member; a motor attached to the free endof the supporting member; a trimming knife mounted on the motor shaftand driven thereby; a guide member adapted for contact with the edge ofthe fabric to be trimmed and supported from the motor, said swinginglymounted supporting member being in position to normally cause the motorto swing toward the edge of the fabric to be trimmed whereby the guidemember is yieldably held in contact with the edge of the fabric.

5. A selvage trimmer of the character described, including a swinginglymounted supporting member, a motor mounted on tide comprising upper andlower plates my name in the presence of two subscribing adapted toreceive between them the edge witnesses. of the fabric, there belngregistering opent in the plate members whereby the trim r ROLAN DTROGNER' 5 ming knife may pass through both of said Witnesses:

membe ii'a, B. J. MGDANEL,

In Witness whereof,- I have here'nntq signed E. C. LEADENHAM.

